Wall Street three major indexes all retreated more than 1% on Tuesday, with weakness in megacap growth companies such as Apple Inc and the chip sector weighing most on the Nasdaq ahead of this week's crop of economic data and remarks from Federal Reserve Chair Jerome Powell. Market Snapshot The Dow Jones Industrial Average fell 404.64 points, or 1.04%, to 38,585.19. The S&P 500 lost 52.3 points, or 1.02%, at 5,078.65 and the Nasdaq Composite dropped 267.92 points, or 1.65%, to 15,939.59. Market lg...